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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.5 Oct.15, 2019

AX3116



APPLICATION CIRCUIT

C2

470uF

C4

470uF

1

2

L1

15uH

R5

4.7K

R6

1.5K

VIN+12V

VOUT = 3.3V/5A

D1

B540A

C5

0.1uF

FB

3

EN

2

VCC

1

PVCC

7

5

SW

8

VSS

6

4

AX3116

C3

0.1uF

C6

10nF

SS

OCSET

C7

R3

4R7

R1

100K

47nF

R2

2K

C1

0.1uF

C2

470uF

C4

470uF

1

2

L1

10uH

R5

2.5K

R6

2K

VIN+5V

VOUT = 1.8V/5A

D1

B540A

C5

0.1uF

FB

3

EN

2

VCC

1

PVCC

7

5

SW

8

VSS

6

4

AX3116

R5

R6

VFB = 0.8V ; R4 suggest 0.8K ~ 4k

VOUT = VFB x (1 +

)

C3

0.1uF

C6

10nF

SS

OCSET

C7

R3

4R7

R1

100K

0.1uF

R2

3.75K

C1

0.1uF

L1 recommend value (VIN=12V ,IOUT=5A)

VOUT

1.8 V

2.5V

3.3V

5V

L1

10uH

10uH

15uH

15uH



FUNCTION DESCRIPTIONS

PWM Control

The AX3116 consists of DC/DC converters that employ a pulse-width modulation (PWM)

system. In converters of the AX3116, the pulse width varies in a range from 0 to 100%,

according to the load current. The ripple voltage produced by the switching can easily be

removed through a filter because the switching frequency remains constant. Therefore, these

converters provide a low-ripple power over broad ranges of input voltage and load current.

Setting the Output Voltage

Application circuit item shows the basic application circuit with adjustable output

version. The external resistor sets the output voltage according to the following equation:











 





6

5

1

0.8

R

R

V

V

OUT